A synapse is a tiny gap between two nerve cells, or neurons, that allows them to communicate with each other. When a neuron sends a signal, it releases chemicals called neurotransmitters into this gap. These neurotransmitters then bind to receptors on the next neuron, passing along the message. This process is essential for everything from muscle movement to memory formation. There are two main types of synapses: chemical synapses and electrical synapses. In a chemical synapse, the signal is transmitted through neurotransmitters, while in an electrical synapse, the signal passes directly through channels connecting the neurons. Both types play crucial roles in the nervous system's function.